Effect of L-shaped slots on scour around a bridge abutment

Local scour is the most significant cause of bridge failure. Providing a short abutment with a straight slot has proved to be an effective method for reducing scour at this abutment. In this study, laboratory experiments have been conducted to investigate the effectiveness of using L-shaped slots in...

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Autores principales:	Neveen Y. Saad, Ehab M. Fattouh, M. Mokhtar
Formato:	article
Lenguaje:	EN
Publicado:	IWA Publishing 2021
Materias:	abutment scour slot Environmental technology. Sanitary engineering TD1-1066
Acceso en línea:	https://doaj.org/article/72cf7af2100243b69ad094a4d4a9aaa0
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spelling	oai:doaj.org-article:72cf7af2100243b69ad094a4d4a9aaa02021-11-05T21:14:36ZEffect of L-shaped slots on scour around a bridge abutment1751-231X10.2166/wpt.2021.037https://doaj.org/article/72cf7af2100243b69ad094a4d4a9aaa02021-07-01T00:00:00Zhttp://wpt.iwaponline.com/content/16/3/935https://doaj.org/toc/1751-231XLocal scour is the most significant cause of bridge failure. Providing a short abutment with a straight slot has proved to be an effective method for reducing scour at this abutment. In this study, laboratory experiments have been conducted to investigate the effectiveness of using L-shaped slots in comparison to the commonly used straight slot, on the scour reduction at short vertical-wall abutment under clear-water flow conditions and uniform bed materials. The slots were just above the bed and their diameters equal to half the abutment's length. The results illustrated that it is essential to have a straight slot in any combination of slots, as any configuration without one is inefficient. Also, a combination of a straight slot with one side slot in the middle of the abutment's width gives better performance than an individual straight slot, as it reduces the depth, area, and volume of the scour hole by about 32.6, 26.8, and 43.6% respectively, in comparison to 23.2, 20.7, and 35.3% for the straight slot alone. Highlights Constructing a bridge across a river alternates the river flow pattern, and vortexes take place around the the abutments. These vortexes cause scour development.; Few researches have studied the behaviour of straight-slotted abutments.; The aim of the presented work is to investigate the behaviour of L-shaped abutment's slots in comparison to the commonly used straight slot.;Neveen Y. SaadEhab M. FattouhM. MokhtarIWA PublishingarticleabutmentscourslotEnvironmental technology. Sanitary engineeringTD1-1066ENWater Practice and Technology, Vol 16, Iss 3, Pp 935-945 (2021)
institution	DOAJ
collection	DOAJ
language	EN
topic	abutment scour slot Environmental technology. Sanitary engineering TD1-1066
spellingShingle	abutment scour slot Environmental technology. Sanitary engineering TD1-1066 Neveen Y. Saad Ehab M. Fattouh M. Mokhtar Effect of L-shaped slots on scour around a bridge abutment
description	Local scour is the most significant cause of bridge failure. Providing a short abutment with a straight slot has proved to be an effective method for reducing scour at this abutment. In this study, laboratory experiments have been conducted to investigate the effectiveness of using L-shaped slots in comparison to the commonly used straight slot, on the scour reduction at short vertical-wall abutment under clear-water flow conditions and uniform bed materials. The slots were just above the bed and their diameters equal to half the abutment's length. The results illustrated that it is essential to have a straight slot in any combination of slots, as any configuration without one is inefficient. Also, a combination of a straight slot with one side slot in the middle of the abutment's width gives better performance than an individual straight slot, as it reduces the depth, area, and volume of the scour hole by about 32.6, 26.8, and 43.6% respectively, in comparison to 23.2, 20.7, and 35.3% for the straight slot alone. Highlights Constructing a bridge across a river alternates the river flow pattern, and vortexes take place around the the abutments. These vortexes cause scour development.; Few researches have studied the behaviour of straight-slotted abutments.; The aim of the presented work is to investigate the behaviour of L-shaped abutment's slots in comparison to the commonly used straight slot.;
format	article
author	Neveen Y. Saad Ehab M. Fattouh M. Mokhtar
author_facet	Neveen Y. Saad Ehab M. Fattouh M. Mokhtar
author_sort	Neveen Y. Saad
title	Effect of L-shaped slots on scour around a bridge abutment
title_short	Effect of L-shaped slots on scour around a bridge abutment
title_full	Effect of L-shaped slots on scour around a bridge abutment
title_fullStr	Effect of L-shaped slots on scour around a bridge abutment
title_full_unstemmed	Effect of L-shaped slots on scour around a bridge abutment
title_sort	effect of l-shaped slots on scour around a bridge abutment
publisher	IWA Publishing
publishDate	2021
url	https://doaj.org/article/72cf7af2100243b69ad094a4d4a9aaa0
work_keys_str_mv	AT neveenysaad effectoflshapedslotsonscouraroundabridgeabutment AT ehabmfattouh effectoflshapedslotsonscouraroundabridgeabutment AT mmokhtar effectoflshapedslotsonscouraroundabridgeabutment
_version_	1718443987747995648

Effect of L-shaped slots on scour around a bridge abutment

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